Image:
Glasshead Barreleye from below

The ventral side of the head of a Glasshead Barreleye trawled from a depth of around 1000 m on the abyssal plain in the southern Tasman Sea, between Tasmania and New Zealand. The snout is towards the bottom of the image. The coloured structures are the mirror-organs through which light from the side and below is detected. The two opercular flaps are visible at the top of the image.